Vermont 2009 NCore Monitoring Network Plan · The network modifications, including NCore, should be...

Vermont NCore Monitoring Plan 2009 Revision 1.1, July 10, 2009

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Vermont National Core (NCore) Monitoring Work Plan

2009

Vermont Department of Environmental Conservation Air Pollution Control Division

July 10, 2009


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Table of Contents

Section Page Number Table of Contents............................................................................................................................ 2 List of Figure................................................................................................................................... 3 List of Tables .................................................................................................................................. 4 Acronyms and Abbreviations ......................................................................................................... 5 EPA NCore Program Background.................................................................................................. 6 NCore Monitoring Objectives......................................................................................................... 6 The NCore network will address the following objectives:............................................................ 6 Vermont NCore Air Monitoring Site Overview ............................................................................. 7 Area of Representativeness:............................................................................................................ 7 NCore Pollutant Monitoring Descriptions .................................................................................... 12 NCore PM2.5 FRM Monitoring Network ...................................................................................... 12 NCore PM2.5 Speciation Monitoring Network.............................................................................. 13 NCore Continuous PM2.5 Monitoring Network ............................................................................ 13 NCore Ozone Monitoring Network .............................................................................................. 14 NCore Ambient Air Toxics Monitoring Network ........................................................................ 14 NCore PM10 Monitoring Network ................................................................................................ 15 NCore Trace Level Total Reactive Nitrogen Monitoring ( New Summer 2009) ......................... 16 NCore Trace Level Carbon Monoxide Monitoring (New Summer 2009) ................................... 16 NCore Trace Level Sulfur Dioxide Monitoring Network (New Summer 2009).......................... 16 NCore Trace Level Blender/Zero Air System (New Summer 2009) ........................................... 17 NCore Meteorological Measurements .......................................................................................... 17 Site Description: Underhill – 58 Harvey Road ............................................................................. 19 General References ....................................................................................................................... 24


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List of Figure Figure ID Page Number Figure 1 - Vermont Town & County Boundaries ........................................................................ 10 Figure 2 - 2009 Vermont NCore Site Map ................................................................................... 11 Figure 4 - Aerial View Underhill.................................................................................................. 21 Figure 5 - General Site View ........................................................................................................ 21 Figure 6 – Current Interior Shelter Setup ..................................................................................... 22 Figure 7 - Underhill Installed 10 Meter NOy Tower.................................................................... 22 Figure 8 - Directional Views from Roof of Trailer....................................................................... 23


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List of Tables Table ID Page Number Table 1 - Spatial Representations ................................................................................................... 8 Table 2 - Monitored Pollutants & Parameters .............................................................................. 12 Table 3 – PM2.5 Sample/Analysis Method.................................................................................... 12 Table 4 – Speciation Sample/Analysis Method............................................................................ 13 Table 5 - Continuous PM2.5 Method ............................................................................................. 13 Table 6 - Ozone Monitoring Method............................................................................................ 14 Table 7 - 2006- 2008 Ozone Design Value - Underhill, VT ........................................................ 14 Table 8 – NCore Ambient Air Toxic Sampling/Analysis Methods............................................. 15 Table 9 – PM10 Sample/Analysis Method ................................................................................... 15 Table 10 – Nitrogen Dioxide Monitoring Method........................................................................ 16 Table 11– Carbon Monoxide Monitoring Method........................................................................ 16 Table 12– Sulfur Dioxide Monitoring Method............................................................................. 17 Table 13 - Trace Level Blender .................................................................................................... 17 Table 14 – Meteorological Measurements.................................................................................... 17


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Acronyms and Abbreviations AMTIC - Ambient Monitoring Technical Information Center APCD - (Vermont) Air Pollution Control Division AQI – Air Quality Index CAA - Clean Air Act CARB – California Air Resources Board CFR - Code of Federal Regulations CO – Carbon Monoxide CSA - Combined Statistical Area EPA - Environmental Protection Agency ESC - Environmental Systems Corporation FDMS – Filter Dynamic Measurement System FEM - Federal Equivalent Method FRM - Federal Reference Method GIS - geographical information systems HAP - hazardous air pollutants HAAS – Hazardous Ambient Air Standard IMPROVE - Interagency Monitoring of Protected Visual Environments IO - inorganic MQOs - measurement quality objectives MPA - monitoring planning area MSA - metropolitan statistical area NAAQS - National Ambient Air Quality Standards NADP – National Atmospheric Deposition Program NAMS - national air monitoring station NATTS- National Air Toxic Trends Stations network NCore – National Core Monitoring Sites NECMSA - New England county metropolitan statistical area NOX – Oxides of Nitrogen NOy - sum of the individual reactive nitrogen oxide species NO2 – Nitrogen Dioxide O3 - Ozone OAQPS - Office of Air Quality Planning and Standards PESA- Proton-Elastic Scattering Analysis PIXE- Proton Induced X-ray Emission PMSA - primary metropolitan statistical area PM10 – Particulate ≤10 micron aerodynamic particle size PM2.5 - Particulate ≤2.5 micron aerodynamic particle size PAH – Polycyclic Aromatic Hydrocarbon QA - quality assurance QA/QC - quality assurance/quality control QAPP - quality assurance project plan SLAMS - state and local monitoring stations SO2 – Sulfur Dioxide SOP - standard operating procedure SPMS - special purpose monitoring stations TEOM – Tapered Element Oscillating Microbalance TL – trace level TOR – Total Organic Reduction TSP - total suspended particulate TSS - Technical Services Section (Monitoring Section) of the APCD VOC - volatile organic compound XRF – X-Ray fluorescence


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EPA NCore Program Background In October 2006 the United States Environmental Protection Agency (EPA) issued final amendments to the ambient air monitoring regulations for criteria pollutants. These amendments are codified in 40 CFR parts 53 and 58. The purpose of the amendments was to enhance ambient air quality monitoring to better serve current and future air quality needs. One of the most significant changes in the regulations was the requirement to establish National Core (NCore) multi-pollutant monitoring stations. These stations will provide data on several pollutants at lower detection limits and replace the National Air Monitoring Station (NAMS) networks that have existed for several years. The final network plan must be submitted to EPA by July 1, 2009 and the stations must be operational by January 1, 2011. A new national monitoring network design (called NCore) should accommodate these recommendations and the major demands of air monitoring networks, such as: • trend determinations • reporting to the public • assessing the effectiveness of emission reduction strategies • providing data for health assessments and NAAQS review • determinations of attainment and nonattainment status. The network modifications, including NCore, should be conducted within current resource allocations used to support monitoring (e.g., with respect to staffing). However, there needs to be modest investments in new equipment to upgrade monitoring systems to meet new priorities and accommodate advanced technologies.

NCore Monitoring Objectives1

The NCore network will address the following objectives: • Timely reporting of data to public by supporting AIRNow, air quality forecasting,

and other public reporting mechanisms; • Support for development of emission strategies through air quality model evaluation

and other observational methods; • Accountability of emission strategy progress through tracking long-term trends of

criteria and non-criteria pollutants and their precursors; • Support for long-term health assessments that contribute to ongoing reviews of the

NAAQS; • Compliance through establishing nonattainment/attainment areas through

comparison with the NAAQS;

1 Website http://www.epa.gov/ttn/amtic/ncore/index.html


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• Support to scientific studies ranging across technological, health, and atmospheric process disciplines; and

• Support to ecosystem assessments recognizing that national air quality networks benefit ecosystem assessments and, in turn, benefit from data specifically designed for address ecosystem analyses.

Vermont NCore Air Monitoring Site Overview The Underhill, Vermont monitoring site (AQS ID Code 500070007) has been designated as the NCore monitoring site for Vermont. The site is located at the Proctor Maple Research Center (PMRC), which is owned and operated by the University of Vermont. The air monitoring site was originally established in 1983. The site was upgraded in 1989 with a new trailer, and continuous ozone monitoring. The Interagency Monitoring of Protected Visual Environments (IMPROVE) site was established in 1988 and was upgraded in 2003. The site became a National Air Toxics Trends Site (NATTS) in 2004. The site is also a part of the National Atmospheric Deposition Program (NADP/MDN) operated cooperatively by University of VT and Ecosystems Research Group, LTD. That effort has been on-going since 1984. The monitoring site is characterized as an open sloping field surrounded by the densely forested western slope of Mount Mansfield. The is part of the Burlington-South Burlington - Core Base Statistical Area (CBSA) and approximately 26 km east of downtown Burlington, VT. The 5 km surrounding area includes farms, residential homes, state park, and a maple forest research laboratory. The site is rural in nature and located south west of the summit of Mount Mansfield. This monitoring location meets all siting requirements and criteria and has been approved by VTAPCD and EPA Region 1 The Underhill site was selected due to the needs of the NCore program for a well establish background trends site. The Underhill site has a well establish SLAMS Criteria (PM2.5, Ozone) NATTS – monitoring for atmospheric VOC, Carbonyl, PAH, Metals and an IMPROVE monitors for speciated particulate.

Area of Representativeness:

40 CFR Part 58 Appendix D2 provides design criteria for ambient air monitoring. The Underhill monitoring objective for the NCore site is to produce data that represents a fairly large area and therefore the spatial scale of the site is important. Underhill has been designated as a rural NCore monitoring site.

• Each State (i.e. the fifty States, District of Columbia, Puerto Rico, and the Virgin Islands) is required to operate at least one NCore site.

2 Code of Federal Regulation, (e-CFR) 40 CFR Part 58, Protection of Environment, June 6, 2008.


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• Rural NCore stations are to be located to the maximum extent practicable at a regional or larger scale away from any large local emission source, so that they represent ambient concentrations over an extensive area.

• The NCore sites must measure, at a minimum, PM2.5 particle mass using continuous and integrated/filter-based samplers, speciated PM2.5, PM10–2.5 particle mass, speciated PM10–

2.5, O3, SO2, CO, NO/NOy, wind speed, wind direction, relative humidity, and ambient temperature. Although the measurement of NOy is required in support of a number of monitoring objectives, available commercial instruments may indicate little difference in their measurement of NOy compared to the conventional measurement of NOX, particularly in areas with relatively fresh sources of nitrogen emissions. Therefore, in areas with negligible expected difference between NOy and NOX measured concentrations, the Administrator may allow for waivers that permit NOX monitoring to be substituted for the required NOy monitoring at applicable NCore sites.

Regional scale —Defines usually a rural area of reasonably homogeneous geography without large sources, and extends from tens to hundreds of kilometers.

Table 1 - Spatial Representations

Pollutant Spatial Scale Comments

Ozone Regional Commenced in 1989 NOy -TL Regional Scheduled for summer 2009 CO - TL Regional Scheduled for summer 2009 SO2- TL Regional Scheduled for summer 2009

PM10 – (Metals) Regional Commenced in 2004 PM10 -Lo-Vol Regional Commenced in 2007

PM2.5 Regional 1999-2002 & Restarted 2007 VOC Regional Commenced in 2004

Carbonyl Regional Commenced in 2004 PAH Regional Commenced in 2008

IMPROVE Regional Commenced in 2003 NADP/MDN 3 Regional Commenced in 1984

Quality Assurance Project Plans The Vermont APCD and partnering organizations will utilize current operational quality assurance project plans that are approved or in the process of approval for the NCore site. These documents provide the background that will guide the operational, data analysis, and reporting activities. Currently equipment SOP’s data acquisition, and data validation methods are being developed for trace level continuous methods prior to field deployment. 3 Mercury Deposition Network station operated by University of Vermont and participating organizations.


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• Quality Assurance Project Plan For The Air Toxics Monitoring and National Air Toxics Trends Station Networks – Rev 2.2 December 30, 2008

• Vermont PM2.5 Quality Assurance Project Plan – Rev 2.2 February 6, 2008 • Quality Assurance Project Plan For Criteria Pollutant – Rev 2.0 May 2, 20074 • IMPROVE: Interagency Monitoring of Protected Visual Environments Quality

Assurance Project Plan OAQPS Category 1 QAPP Rev 0.0 March 2002 • NADP Quality Management Plan - Ver. 1.0; December 2003

4 Quality Assurance Plan for Criteria Pollutants has conditional EPA Region 1 approval with outstanding SOP’s and meteorological section. Planned completion – July 2009


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of 24 Figure 2 - 2009 Vermont NCore Site Map

2009 Vermont NCore Air Monitoring Site

Underhill, Proctor Maple Research Center: -ozone -IMPROVE Protocol (PM2.5, PM2.5 speciation and PM10) -PM2.5 continuous (by TEOM-FDMS) -PM10 (R&P sequential) 1/3 day co-located -PM2.5 FEM, 1/3 day -PM coarse by subtraction of above -volatile organic compounds, 1/6 days -carbonyls, 1/6 days -PM10 /toxic elements, 1/6 days* -trace-level carbon monoxide (summer 2009) -trace-level sulfur dioxide (summer 2009) -nitrogen oxides (summer of 2009) -Hexavalent chromium sampling, 1/6 -Poly Aromatic Hydrocarbons 1/6 - Continuous Hg (EPA Contracted) -meteorology


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NCore Pollutant Monitoring Descriptions Below is the list of network pollutant monitoring descriptions at the Underhill NCore monitoring site. The sampling frequency, and specific network information.

Table 2 - Monitored Pollutants & Parameters

Parameter Comments PM2.5 speciation Organic and elemental carbon, major ions and trace metals (24

hour average; every 3rd day)

PM2.5 FRM mass 24 hr. average every 3rd day

PM10 Hi Volume & Metals 24 hr average every 6th day – metals analysis on sample

continuous PM2.5 mass 1 hour reporting interval for all cont. species

ozone (O3) all gases through cont. monitors (except HNO3 and NH3)

carbon monoxide trace level (CO) capable of trace levels (low ppb and below) where needed

sulfur dioxide trace level (SO2) capable of trace levels (low ppb and below) where needed

nitrogen oxide trace level (NO) capable of trace levels (low ppb and below) where needed

total reactive nitrogen trace level (NOy) capable of trace levels (low ppb and below) where needed

surface meteorology wind speed and direction, temperature, RH, Baro, Solar, Precip

NCore PM2.5 FRM Monitoring Network

The Underhill PM2.5 FRM is one of four FRM sites in the state of Vermont. The other monitoring locations are in Burlington, Bennington, Rutland. The network samplers operate on a 1-in-3 day sampling schedule. The sampling method is an EPA approved method, collecting an integrated 24 hour particulate sample on a 47mm Teflon® filter disc (See Table 3). The particulate collected on the filter has an aerodynamic particle size of ≤2.5 microns. The filter and associated sampling data are post processed through gravimetric analysis to determine the mass concentration for the 24 hour sampling period. Table 3 – PM2.5 Sample/Analysis Method

Pollutant Sampler Collection Analytical Method

Analytes /Lab

PM2.5 R&P 2025

Manual Reference Method: EQPM–0202–145

Low Volume 47 mm

Teflon® Filter - 24 Hour

Gravimetric PM2.5

VT DEC

“Design values” for PM2.5 are calculated every year for operational sites operating FRM or FEM PM2.5 samplers. The site must meet the design value statistical definition in order for a design value to be calculated. The Underhill FRM sampler was restarted in 2007 and does not currently have three years of continuous data from this location as required to calculate the design value.


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NCore PM2.5 Speciation Monitoring Network Underhill has an established Interagency Monitoring of Protected Visual Environments (IMPROVE) monitoring site that was originally established in 1986. The sampler operates on a 1-in-3 day schedule and produce a 24 hour integrated filter based sample. The Underhill site part of the IMPROVE network. There is another Vermont IMPROVE site at the in Manchester, Lye-Brook Wilderness which is operated and maintained by the National Forest Service and is not part of the Vermont APCD network. The IMPROVE network monitors are mostly located in rural areas, and provide measurements of regional and background levels of PM2.5 concentrations. The analysis of the filters generates data on chemical makeup of PM2.5. The method is capable of measuring concentration levels of sulfate, nitrate, ammonium, and trace elements including metals, elemental carbon, and organic carbon. Table 4 – Speciation Sample/Analysis Method


Analytes /Lab

PM Speciation ( IMPROVE) UCDavis – IMPROVE Sampler

Low Volume Multi Filter -

24 Hour IMPROVE

See Appendix

A/UCDavis

NCore Continuous PM2.5 Monitoring Network The Underhill is one of four continuous PM2.5 sites operated in the state of Vermont. The R&P Model 8500 FDMS TEOM are also operated at the Bennington, Burlington, and Rutland sites. All continuous PM2.5 samplers are operated year-round and have a collocated PM2.5 FRM sampler for comparative analysis. Data is reported to 1-hour and 24-hour averaging periods. The data is currently used for PM2.5 AQI determination and trends analysis. Table 5 - Continuous PM2.5 Method


Reported Data Interval

PM2.5

R&P Model 8500 FDMS TEOM

Low Volume Filter/

microbalance

Continuous gravimetric 1 Hour


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NCore Ozone Monitoring Network

The Underhill ozone monitor is one of two ozone sites in the State of Vermont air monitoring network. Both ozone analyzers are operated year-round. Data is collected on an hourly basis. Data resolution is store in 1 minute, 5 minute, 1 hour, and 8 hour averaging intervals. Ozone measurements are utilized to determine compliance with 1 hour and 8 hour NAAQS. Data is transferred hourly to the EPA AIRNOW website for AQI mapping and air quality forecasting. “Design values” for ozone must be calculated every year for operational sites operating FEM instruments. The site must meet the design value statistical definition in order for a design value to be calculated. See below for further information. Table 6 - Ozone Monitoring Method



Ozone

API 400 Automated Equivalent

Method: EQOA-0992-087

Continuous sampling Ultraviolet 1 Hour

Ozone Design Value (2006-2008) Below are the current design values for ozone from 2006-2008 (See Table 8). Ozone design values are calculated by taking the 3-year average of the annual 4th maximum daily maximum 8-hour ozone averages. The current 8-hour ozone standard is 0.075 ppm. Currently, all Vermont monitors are in attainment for ozone. Table 7 - 2006- 2008 Ozone Design Value - Underhill, VT

Site Design Value (ppm)

Underhill .070

NCore Ambient Air Toxics Monitoring Network The Underhill site is part of the EPA National Air Toxics Trends Stations (NATTS) network. In addition to Underhill APCD operates two other ambient air toxics monitoring sites. The two monitoring sites are located in Burlington, Rutland. Samplers at the sites are operated on a 1-in-12 day (Burlington, Rutland) or 1-in-6 day sample schedule (Underhill). The air toxic sample collection and analysis program includes volatile organic compounds (VOC), carbonyl compounds, and elemental metals at all sites. In addition, the NATTS - Underhill site includes sampling for hexavalent chromium(Cr+6) and Polyaromatic Hydrocarbons (PAH) compounds.


of 24 Table 8 – NCore Ambient Air Toxic Sampling/Analysis Methods


Analytes/Lab

VOC ATEC 301 6 Liter SS Canister- 24 Hour

TO-15 56 VOC Compounds

ERG

Carbonyl ATEC 300 DNPH

Cartridge- 24 Hour

TO-11A 4 Carbonyl Compounds

VTDEC and/or ERG

Metals Wedding 1000 Quartz Fiber

Filter- 24 Hour

IO-3.5

11 Elements ERG and/or VT

DEC

PAH Tisch TE-1000 PUF/XAD- 24 Hour TO-13

22 PAH Compounds ERG

Hexavalent Chromium VT APCD Cr+6

Sampler (based on ERG design)

Cellulose Filter-

24 Hour

Modified CARB 039

1 Element ERG

NCore PM10 Monitoring Network

In Underhill two collocated low-volume R&P 2025 samplers are configured to collect PM10. The sample is collected on a 47mm Teflon® filter. Subsequent gravimetric analysis is performed to determine the mass concentration. In addition to Vermont low-volume PM10 sampling, APCD also operates high volume 24 hr sample collection on an 8”x10” quartz fiber filter on a 1-6 day schedule. The particulate collected on the filter has an aerodynamic particle size of ≤10 microns. The filter and associated sampling data are post processed through gravimetric analysis to determine the mass concentration for the 24 hour sampling period. When the gravimetric determination is completed, the glass fiber filters are processed and analyzed for elemental metals. Table 9 – PM10 Sample/Analysis Method


Analytes /Lab

PM10 Wedding 1000 Reference Method:

RFPS-1087-062

Hi Volume 8x10 Quartz fiber filter

Gravimetric PM10

VT DEC

PM10 R&P 2025

Manual Reference Method: RFPS-1298-127

Low Volume 47 mm

Teflon® Filter Gravimetric

PM10 VT DEC


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NCore Trace Level Total Reactive Nitrogen Monitoring ( New Summer 2009) The total reactive nitrogen oxides analyzer (NOy) sampler will be operated year-round. The proposed plan calls for NOy trace level (TL) measurements to commence in Underhill for summer 2009. The Ecotech EC9841 Total Reactive Nitrogen Oxides Analyzer utilizes chemiluminescence detection to measure NO and NOy in the ranges of 0-2000 ppb with a detection limit of 50 ppt or .050 ppm. Table 10 – Nitrogen Dioxide Monitoring Method



NOy (TL)

Ecotech EC9841T Automated Reference

Method: RFNA-1292-090

Continuous sampling

Chemiluminescence 1 Hour

NCore Trace Level Carbon Monoxide Monitoring (New Summer 2009) Trace-level (TL) carbon monoxide will be monitored in Underhill. The Ecotech EC9830 will be utilized for monitoring. Detection of sub-ambient levels of CO is made challenging due to interference by H2O and CO2. The use of gas filter correlation technology minimizes this interference and enables the instrument to measure CO in ambient air in the range of 0-20,000 ppb with a estimated detection limit of 25 ppb. Table 11– Carbon Monoxide Monitoring Method



Carbon Monoxide (TL)

Ecotech EC9830 Automated Reference

Method: RFCA-0992-088

Continuous sampling Infra-red 1 Hour

NCore Trace Level Sulfur Dioxide Monitoring Network (New Summer 2009) The Vermont APCD will operate trace level sulfur dioxide (SO2) analyzer, located at the in Underhill by summer 2009. The Thermo Environmental Instruments Model 43C TL trace level unit utilizes the pulsing of the U.V. source lamps to increase the optical intensity whereby a greater U.V. energy throughput and lower detectable SO2 concentration are realized. Trace level SO2 detection limits are estimated to be 0.05 ppb.


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Sulfur Dioxide (TL)

TEI 43C – TL Automated Equivalent

Method: EQSA-0486-060

Continuous sampling

Pulsed Florescence 1 Hour

NCore Trace Level Blender/Zero Air System (New Summer 2009) The APCD will operate the API Model 700/701 system as the station multi-gas blender/zero air system The unit will operate trace level multi-qas blender to deliver accurate low level concentrations to the CO, NOy, O3, SO2 units to a parts per trillion (PPT) input level. Unit will be deployed to the monitoring site by summer of 2009. Table 13 - Trace Level Blender

Operation Model Flow Range O3 Transfer

Std

CertificationSchedule MFC/O3

Multi-Gas Blending System

APT 700– TL API 701 HF

MFC 1- 0-10 cc/min MFC 2- 0-100 cc/min MFC 3- 0-20 l/min

Yes 90 days

NCore Meteorological Measurements The APCD currently operates the Met One meteorological system on a 10 meter tower. Parameters include wind speed, wind direction, relative humidity, temperature, barometric pressure, solar radiation, and precipitation. Quarterly sensor checks are preformed to assure sensors are performing within specifications. The quality assurance project plan for meteorological monitoring is pending and will be submitted to EPA NE by the fall 2009. Table 14 – Meteorological Measurements

Operation Model Units Data Reporting Interval

Data Acquisition

Wind Speed Ultrasonic M/S 1min,

15,min, 1hr

Data logger

Wind Direction Ultrasonic Deg 1min,

15,min, 1hr

Data logger


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Operation Model Units Data Reporting Interval

Data Acquisition

Temperature

Thermistor

Deg. C

1min, 15,min,

1hr

Data logger

Relative Humidity Di-electric Polymer % H2O 1min,

15,min, 1hr

Data logger

Solar Radiation Differential Thermopile Watts/m2

1min, 15,min,

1hr

Data logger

Precipitation Tipping Gauge Inches 1min,

15,min, 1hr

Data logger

Barometric Pressure Pressure Transducer mmHg 1min,

15,min, 1hr

Data logger


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Site Description: Underhill – 58 Harvey Road Town – Site Underhill – Proctor Maple Research Center County: Chittenden Latitude: +44.528390 Address: 58 Harvey Rd. Longitude: -72.868840 AQS Site ID: 50-007-0007 Elevation: 392 m Spatial Scale: Rural Year Established: 1988 Statistical Area: Burlington-South Burlington, VT Metropolitan Area Burlington-South Burlington, VT Metropolitan NECTA

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Underhill 56 Harvey Rd. PT PT PT

Site Description: This site is located at the western slope of Mount Mansfield at the north end Underhill, VT. The site is rural in nature and located 5 km south west of the summit of Mount Mansfield, 6 km south of Route 15, and 26 km east of Burlington. This monitoring location meets all siting requirements and criteria and has been approved by VTAPCD and EPA Region 1 General Monitoring Description & Objectives: The monitoring objective for ozone, PM2.5, PM10, PM speciation and future trace-level monitoring is regional scale background levels. The monitoring objectives for the VOC, Carbonyl , PAH, metals and CR+6 sample collection and analysis are to assess background levels on a regional scale for short and long-term trends, comparison to applicable state standards and federal guidelines and assessment of contribution of transported pollutants. WS/WD & Temp/RH data is collected from a 10.0 meter tower. Plans/History:

• Site Established 1988 P = Planned startup 2008 T = Trace Level


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Figure 3 Regional Satellite Map

Underhill NCore Station


of 24 Figure 4 - Aerial View Underhill

Figure 5 - General Site View


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Figure 6 – Current Interior Shelter Setup

Figure 7 - Underhill Installed 10 Meter NOy Tower


of 24 Figure 8 - Directional Views from Roof of Trailer

N

W E S

Vermont NCore Plan 2009 Revision 1.1, July 10 2009

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General References 1. United States Environmental Protection Agency Air and Radiation - National Ambient

Air Quality Standards (NAAQS) March 2, 2007 http://epa.gov/air/criteria.html 2. State of Vermont, Agency of Natural Resources, Air Pollution Control Regulation;

Appendix C, December 31, 2003

3. Electronic Code of Federal Regulations (e-CFR) Part 58 Subpart B § 58.10 http://www.gpoaccess.gov/cfr/index.html

4. United States Environmental Protection Agency, Technology Transfer Network, Ambient

Monitoring Technology Information Center – List of Designated EPA Reference and Equivalent Methods May 16, 2007 http://www.epa.gov/ttn/amtic/criteria.html

5. Code of Federal Regulation, (e-CFR) 40 CFR Part 50, Protection of Environment, June 6,

2008.

6. Code of Federal Regulation, (e-CFR) 40 CFR Part 53, Protection of Environment, June 6, 2008.

7. Code of Federal Regulation, (e-CFR) 40 CFR Part 58, Protection of Environment, June 6,

2008.

8. Draft - Ambient Air Monitoring Work plan For National Core (NCore) Monitoring Station CBSA Louisville-Jefferson County , Louisville Metro Air Pollution Control District - 2009

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